Is he laying upright or flopped over on his side? What is he fed? Water temp?
If he's on his side it could be related to his swim bladder. Since Bettas are meat eaters I imagine he is being fed a food high in meat, so constipation is always a concern. It is recommended that Betta owners feed part of a pea to their Bettas at least once a week to prevent constipation. Feeding part of a pea now may help get him eating again, that is, if you can get him to eat the pea in the first place. He may just need help passing something through his system.
Also, swim baldder problems are often related to diet or feeding habits. So, if he is having swim bladder issues, feeding a pea now may get him back on his feet, so to speak.
Water temp may also play a role, based on where he's kept. Bettas are tropical so they need warm water. The colder the water the less active they will become and, if the water is cool enough, they can die. The water temp will also affect their hunger. Bettas kept in cooler water tend to require less food.
Last edited by Tilt; 08-22-2005 at 03:09 AM.